Moog Gmbh

Larry D Hall

John Christian Layer

Gregory Joseph Guzewich

A fail-safe ride simulator (10) broadly includes a base (11), a platform (13) mounted for movement relative to the base, an actuation mechanism (14) operatively arranged between the platform and an actuation mechanism operatively arranged between the platform and the base. The actuation mechanism includes a plurality of electro-mechanical servoactuators (23) acting between the platform and base for causing relative movement therebetween. A fail-safe circuit (34) is operatively arranged to continuously monitor the condition of the actuation mechanism, and to cause the platform to move automatically toward a predetermined position relative to the base in the event of an unsafe condition in the actuation mechanism.

Fail-safe ride simulator

An improved piston-and-cylinder arrangement has a pressure-balanced piston head mounted on an actuator rod. The piston head is mounted for axial movement with the rod, and for radial movement relative thereto. Three annular ring-type seals are provided between facing cylindrical surfaces of the piston head and rod. The frictional impediment to radial movement of the piston head relative to the rod is minimized, and the improved device exhibits a reduction in the average maximum longitudinal frictional force per stroke.

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East Aurora, NY, United States of America

Larry D Hall